CN112606513A - Instrument foam pad with buffer structure and preparation method thereof - Google Patents

Instrument foam pad with buffer structure and preparation method thereof Download PDF

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Publication number
CN112606513A
CN112606513A CN202011481435.4A CN202011481435A CN112606513A CN 112606513 A CN112606513 A CN 112606513A CN 202011481435 A CN202011481435 A CN 202011481435A CN 112606513 A CN112606513 A CN 112606513A
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China
Prior art keywords
foam pad
base
instrument
spring
sliding
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Pending
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CN202011481435.4A
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Chinese (zh)
Inventor
张�杰
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Tianjin Zhiguang Micro Technology Development Co ltd
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Tianjin Zhiguang Micro Technology Development Co ltd
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Priority to CN202011481435.4A priority Critical patent/CN112606513A/en
Publication of CN112606513A publication Critical patent/CN112606513A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014—Use of organic additives
    • C08J9/0023—Use of organic additives containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
    • F16F3/10—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/14—Peroxides

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Emergency Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Molding Of Porous Articles (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to an instrument foam pad with a buffer structure, which comprises an upper anti-slip layer, a moisture-proof layer, an upper foam pad, a base, a lower foam pad and a lower anti-slip layer which are sequentially connected from top to bottom, wherein a cavity is formed in the base, a top rod extending into the cavity is arranged at the top of the base in a penetrating mode, the upper end of the top rod extends into the upper foam pad and is in contact with the upper foam pad, a first spring is arranged between the lower end of the top rod and the inner wall of the base, two sides of the top rod positioned in the cavity are rotatably connected with one end of a connecting rod, the other end of the connecting rod is rotatably connected with a sliding block, the sliding block is arranged in a sliding groove and is connected. The invention also relates to a preparation method of the instrument foam pad with the buffer structure, which is characterized in that the ejector rod, the first spring, the connecting rod, the sliding block and the elastic guide assembly in the base are assembled; and gluing the upper anti-skid layer, the moisture-proof layer, the upper foam pad, the base, the lower foam pad and the lower anti-skid layer in sequence.

Description

Instrument foam pad with buffer structure and preparation method thereof
Technical Field
The invention relates to the technical field of instrument foam pads, in particular to an instrument foam pad with a buffer structure and a preparation method thereof.
Background
Most of instrument equipment all need support the callus on the sole and support, often can produce the vibration in the instrument use, causes the rigidity to strike, leads to equipment parts's damage easily, but current instrument pad adopts cushion or foam direct support mostly, single structure, poor stability to bearing structure's intensity is relatively poor, is difficult to guarantee the stable of instrument and supports.
Disclosure of Invention
The invention provides an instrument foam pad with a buffer structure and a preparation method thereof, and aims to solve the problems in the background art.
The invention provides an instrument foam pad with a buffer structure, which comprises an upper anti-skid layer, a moisture-proof layer, an upper foam pad, a base, a lower foam pad and a lower anti-skid layer which are sequentially connected from top to bottom, a cavity is arranged in the base, a top rod extending into the cavity is arranged at the top of the base in a penetrating way, the top rod can vertically slide relative to the top of the base, the upper end of the top rod extends into the upper foam pad and contacts with the upper foam pad, a first spring is arranged between the lower end of the ejector rod and the inner wall of the base, two sides of the ejector rod positioned in the cavity are rotatably connected with one end of the connecting rod, the other end of the connecting rod is rotatably connected with a sliding block which is arranged in the sliding groove and transversely slides relative to the sliding groove, the spout is located the both sides at base top and is communicated with the cavity, the slider is connected with the one end of elastic guide subassembly, the other end and the base inner wall of elastic guide subassembly are connected.
Preferably, the elastic guide assembly comprises a sliding rod and a second spring, one end of the sliding rod is connected with the sliding block, the other end of the sliding rod is connected with one end of the second spring, the other end of the second spring is fixed with the inner wall of the base, a guide block is arranged on the periphery of the sliding rod, and the guide block slides transversely relative to the sliding groove.
In any of the above schemes, preferably, the upper foam pad and the lower foam pad are both made of the following raw materials in percentage by weight: 30-70% of thermoplastic polyurethane elastomer, 20-50% of foaming agent, 4-9% of cross-linking agent and 4-6% of auxiliary agent.
Preferably in any of the above embodiments, the blowing agent is azodicarbonamide.
Preferably in any of the above embodiments, the crosslinking agent is dicumyl peroxide or di-tert-butylperoxydiisopropylbenzene.
In any of the above embodiments, preferably, the auxiliary is zinc oxide.
The invention also provides a preparation method of the instrument foam pad with the buffer structure, which comprises the following steps:
firstly, assembling a mandril, a first spring, a connecting rod, a sliding block and an elastic guide assembly in a base;
and the second step is to glue the upper anti-skid layer, the moisture-proof layer and the upper foam pad in sequence at the top of the base, and glue the lower foam pad and the lower anti-skid layer in sequence at the bottom of the base.
Preferably, the method for preparing the upper and lower foam mats comprises the following steps:
firstly, putting a thermoplastic polyurethane elastomer into a drying oven with the temperature of 120 +/-5 ℃ for drying for 2 hours, then pouring the thermoplastic polyurethane elastomer into a stirrer, pouring a foaming agent into the stirrer, and stirring for 6-10 minutes at the temperature of 165-185 ℃;
secondly, adding a cross-linking agent and an auxiliary agent, stirring at the temperature of 180-250 ℃ for 3-5 minutes;
and thirdly, filling the stirred mixture into a hopper of an injection machine, keeping the temperature of the hopper at 95-110 ℃, then injecting into a mold, cooling and shaping, and demolding and taking out the piece.
Compared with the prior art, the invention has the advantages and beneficial effects that:
go up the foam pad and have certain elastic deformation ability with lower foam pad, when the instrument foam pad of this embodiment takes place the vibration, the instrument can act on the ejector pin under the vibration effort, makes the ejector pin slide from top to bottom relative the base top, and foam pad is gone up in the extrusion simultaneously, and the foam pad takes place the micro deformation on the messenger. Through being equipped with buffer structure in the base, can turn into the elastic potential energy of first spring and elastic guide subassembly with the produced vibration of instrument, can effectively have the absorbing effect of buffering because of the rigidity impact that the produced vibration of instrument caused, extension instrument's life.
The instrument foam pad with a cushioning structure and the method for manufacturing the same according to the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the foam pad of the instrument with a cushioning structure according to the present invention;
wherein: 1. an anti-skid layer is arranged; 2. a moisture barrier; 3. an upper foam pad; 4. a base; 5. a lower foam pad; 6. a lower anti-slip layer; 7. a chute; 8. a slider; 9. a slide bar; 10. a guide block; 11. a second spring; 12. a connecting rod; 13. a top rod; 14. a first spring; 15. a cavity.
Detailed Description
As shown in figure 1, the invention provides an instrument foam pad with a buffer structure, which comprises an upper anti-skid layer 1, a moisture-proof layer 2, an upper foam pad 3, a base 4, a lower foam pad 5 and a lower anti-skid layer 6 which are sequentially connected from top to bottom, wherein a cavity is arranged in the base 4, a top rod 13 extending into the cavity is arranged at the top of the base 4 in a penetrating way, and ejector pin 13 can vertically slide relative to the top of base 4, the upper end of ejector pin 13 stretches into in supreme foam pad 3 and rather than the contact, be equipped with first spring 14 between the lower extreme of ejector pin 13 and the 4 inner walls of base, ejector pin 13 both sides that are located cavity 15 rotate with the one end of connecting rod 12 and be connected, the other end of connecting rod 12 rotates and is connected with slider 8, slider 8 locates in spout 7 and relative its horizontal slip, both sides at 4 tops of base and cavity intercommunication are located to spout 7, slider 8 is connected with the one end of elasticity direction subassembly, the other end and the 4 inner wall connections of base of elasticity direction subassembly.
In this embodiment, the upper foam pad 3 and the lower foam pad 5 have a certain elastic deformation capability, and when the instrument vibrates in the instrument foam pad of this embodiment, the instrument acts on the ejector rod 13 through the upper foam pad 3 under the vibration acting force, so that the ejector rod 13 slides up and down relative to the top of the base 4, and the upper foam pad 3 is pressed at the same time, so that the upper foam pad 3 slightly deforms. Through be equipped with buffer structure in base 4, can turn into the elastic potential energy of first spring 14 and elastic guide subassembly with the produced vibration of instrument, can effectively have the effect of buffering shock attenuation because of the rigidity impact that the produced vibration of instrument caused, extension instrument's life.
Specifically, when the ejector rod 13 slides downwards relative to the base 4, the ejector rod 13 extrudes the ejector rod 13 downwards, so that the ejector rod 13 compresses the first spring 14 downwards, and at the moment, the ejector rod 13 drives the slide block 8 and the elastic guide assembly to slide along the sliding groove 7 in the direction close to the ejector rod 13 in sequence through the connecting rods 12 on the two sides of the ejector rod 13; when the ejector rod 13 upwards slides relative to the base 4, the first spring 14 resets, the ejector rod 13 extends out of the top of the relative base 4 and extrudes the upper foam pad 3, so that the upper foam pad 3 is slightly deformed, and at the moment, the ejector rod 13 sequentially drives the sliding block 8 and the elastic guide assembly to slide along the sliding groove 7 in the direction away from the ejector rod 13 through the connecting rods 12 on the two sides of the ejector rod 13, so that the reciprocating motion is realized.
Through being equipped with skid resistant course 1, lower skid resistant course 6, effectively promote the skid resistance performance of instrument foam pad, promote stability. By providing the moisture barrier 2, the upper foam pad 3 is protected from moisture.
Further, the elastic guide assembly comprises a sliding rod 9 and a second spring 11, one end of the sliding rod 9 is connected with the sliding block 8, the other end of the sliding rod 9 is connected with one end of the second spring 11, the other end of the second spring 11 is fixed with the inner wall of the base 4, a guide block 10 is arranged on the periphery of the sliding rod 9, and the guide block 10 slides transversely relative to the sliding groove 7.
In the structure, the connecting rod 12 drives the sliding block 8 to slide transversely along the sliding chute 7, and in turn drives the sliding rod 9 and the guide rod thereon to slide along the sliding chute 7, so as to stretch or compress the second spring 11, and the second spring 11 generates elastic potential energy, thereby rapidly converting the kinetic energy of the instrument vibration into the elastic potential energy of the first spring 14 and the second spring 11.
Further, the upper foam pad 3 and the lower foam pad 5 are both made of the following raw materials in percentage by weight: 30-70% of thermoplastic polyurethane elastomer, 20-50% of foaming agent, 4-9% of cross-linking agent and 4-6% of auxiliary agent. Wherein the foaming agent is azodicarbonamide. The cross-linking agent is dicumyl peroxide or di-tert-butylperoxy-diisopropylbenzene. The auxiliary agent is zinc oxide.
In the embodiment, the thermoplastic polyurethane elastomer is used as the main body, so that the rubber has the advantages of good elasticity, high strength, wear resistance, heat resistance and chemical substance erosion resistance. The foaming effect of the thermoplastic polyurethane elastomer is ensured by adding the foaming agent, and the auxiliary agent has the function of nucleating and assisting foaming.
The invention provides a preparation method of an instrument foam pad with a buffer structure, which comprises the following steps:
firstly, assembling a mandril 13, a first spring 14, a connecting rod 12, a sliding block 8 and an elastic guide assembly in a base 4;
and step two, gluing the upper anti-skid layer 1, the moisture-proof layer 2 and the upper foam pad 3 on the top of the base 4 in sequence, and gluing the lower foam pad 5 and the lower anti-skid layer 6 on the bottom of the base 4 in sequence.
The preparation method of the upper foam pad 3 and the lower foam pad 5 comprises the following steps:
firstly, putting a thermoplastic polyurethane elastomer into a drying oven with the temperature of 120 +/-5 ℃ for drying for 2 hours, then pouring the thermoplastic polyurethane elastomer into a stirrer, pouring a foaming agent into the stirrer, and stirring for 6-10 minutes at the temperature of 165-185 ℃;
secondly, adding a cross-linking agent and an auxiliary agent, stirring at the temperature of 180-250 ℃ for 3-5 minutes;
and thirdly, filling the stirred mixture into a hopper of an injection machine, keeping the heat preservation temperature of the hopper at 95110 ℃, then injecting into a mold, cooling and shaping, and demolding and taking out the piece.
In this embodiment, the thermoplastic polyurethane elastomer is divided into two foaming stages, namely a low-temperature foaming stage and a high-temperature foaming stage, and the thermoplastic polyurethane elastomer is foamed by being divided into two stages, so that not only can the foaming performance of the thermoplastic polyurethane elastomer be ensured, but also the continuous foaming of the thermoplastic polyurethane elastomer can be ensured, and the phenomenon that the foaming of the thermoplastic polyurethane elastomer is incomplete or stops due to too high temperature is avoided.
Example 1
The upper foam pad 3 and the lower foam pad 5 are both made of the following raw materials in percentage by weight: 60% of thermoplastic polyurethane elastomer, 30% of foaming agent, 5% of crosslinking agent and 5% of auxiliary agent.
The preparation method of the upper foam pad 3 and the lower foam pad 5 comprises the following steps:
firstly, putting a thermoplastic polyurethane elastomer into a 115 ℃ oven for drying for 2 hours, then pouring the thermoplastic polyurethane elastomer into a stirrer, pouring a foaming agent into the stirrer, stirring at 165 ℃ for 6 minutes;
secondly, adding a cross-linking agent and an auxiliary agent, stirring at 180 ℃, and stirring for 3 minutes;
and thirdly, filling the stirred mixture into a hopper of an injection machine, keeping the temperature of the hopper at 95 ℃, injecting into a mold, cooling and shaping, and demolding and taking out the workpiece.
Example 2
The upper foam pad 3 and the lower foam pad 5 are both made of the following raw materials in percentage by weight: 65% of thermoplastic polyurethane elastomer, 25% of foaming agent, 7% of crosslinking agent and 3% of auxiliary agent.
The preparation method of the upper foam pad 3 and the lower foam pad 5 comprises the following steps:
firstly, putting a thermoplastic polyurethane elastomer into a 125 ℃ oven for drying for 2 hours, then pouring the thermoplastic polyurethane elastomer into a stirrer, pouring a foaming agent into the stirrer, stirring at 175 ℃, and stirring for 8 minutes;
secondly, adding a cross-linking agent and an auxiliary agent, stirring at the temperature of 200 ℃ for 4 minutes;
and thirdly, filling the stirred mixture into a hopper of an injection machine, keeping the temperature of the hopper at 105 ℃, injecting into a mold, cooling and shaping, and demolding and taking out the workpiece.
Example 3
The upper foam pad 3 and the lower foam pad 5 are both made of the following raw materials in percentage by weight: 70% of thermoplastic polyurethane elastomer, 20% of foaming agent, 4% of crosslinking agent and 6% of auxiliary agent.
The preparation method of the upper foam pad 3 and the lower foam pad 5 comprises the following steps:
firstly, putting a thermoplastic polyurethane elastomer into a 125 ℃ oven for drying for 2 hours, then pouring the thermoplastic polyurethane elastomer into a stirrer, pouring a foaming agent into the stirrer, stirring at 185 ℃, and stirring for 6 minutes;
secondly, adding a cross-linking agent and an auxiliary agent, stirring at the temperature of 250 ℃ for 3 minutes;
and thirdly, filling the stirred mixture into a hopper of an injection machine, keeping the temperature of the hopper at 110 ℃, injecting into a mold, cooling and shaping, and demolding and taking out the workpiece.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (8)

1. An instrument foam pad with a cushioning structure, comprising: including last skid resistant course, dampproof course, last foam pad, base, lower foam pad and the lower skid resistant course that from top to bottom connects gradually, the cavity has been seted up in the base, the top of base is run through and is equipped with the ejector pin that extends in the cavity, just the top vertical sliding of base relatively of ejector pin, the upper end of ejector pin stretches to in the foam pad and rather than the contact, be equipped with first spring between the lower extreme of ejector pin and the base inner wall, be located in the cavity the ejector pin both sides are rotated with the one end of connecting rod and are connected, the other end of connecting rod rotates and is connected with the slider, the slider is located in the spout and relative its lateral sliding, the both sides that the base top was located to the spout just communicate with the cavity, the slider is connected with the one end of elastic guidance subassembly, the other end and the base inner wall connection of elastic.
2. The instrument foam pad with a cushioning structure of claim 1, wherein: the elastic guide assembly comprises a sliding rod and a second spring, one end of the sliding rod is connected with the sliding block, the other end of the sliding rod is connected with one end of the second spring, the other end of the second spring is fixed with the inner wall of the base, a guide block is arranged on the periphery of the sliding rod, and the guide block transversely slides relative to the sliding groove.
3. The instrument foam pad with a cushioning structure of claim 1, wherein: the upper foam pad and the lower foam pad are both prepared from the following raw materials in percentage by weight: 30-70% of thermoplastic polyurethane elastomer, 20-50% of foaming agent, 4-9% of cross-linking agent and 4-6% of auxiliary agent.
4. The instrument foam pad with a cushioning structure of claim 3, wherein: the foaming agent is azodicarbonamide.
5. The instrument foam pad with a cushioning structure of claim 3, wherein: the cross-linking agent is dicumyl peroxide or di-tert-butylperoxy-diisopropylbenzene.
6. The instrument foam pad with a cushioning structure of claim 3, wherein: the auxiliary agent is zinc oxide.
7. A method for preparing the foam pad of the instrument with the buffer structure as claimed in any one of claims 1 to 6, wherein: the method comprises the following steps:
firstly, assembling a mandril, a first spring, a connecting rod, a sliding block and an elastic guide assembly in a base;
and the second step is to glue the upper anti-skid layer, the moisture-proof layer and the upper foam pad in sequence at the top of the base, and glue the lower foam pad and the lower anti-skid layer in sequence at the bottom of the base.
8. The method for preparing an instrument foam pad with a cushioning structure according to claim 7, wherein: the preparation method of the upper foam pad and the lower foam pad comprises the following steps:
firstly, putting a thermoplastic polyurethane elastomer into a drying oven with the temperature of 120 +/-5 ℃ for drying for 2 hours, then pouring the thermoplastic polyurethane elastomer into a stirrer, pouring a foaming agent into the stirrer, and stirring for 6-10 minutes at the temperature of 165-185 ℃;
secondly, adding a cross-linking agent and an auxiliary agent, stirring at the temperature of 180-250 ℃ for 3-5 minutes;
and thirdly, filling the stirred mixture into a hopper of an injection machine, keeping the temperature of the hopper at 95-110 ℃, then injecting into a mold, cooling and shaping, and demolding and taking out the piece.
CN202011481435.4A 2020-12-15 2020-12-15 Instrument foam pad with buffer structure and preparation method thereof Pending CN112606513A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207697682U (en) * 2017-12-26 2018-08-07 安徽省龙佳交通设备有限公司 A kind of lorry rear-end device using foamed aluminium
CN209433881U (en) * 2019-03-29 2019-09-24 天津市致广微科技发展有限公司 A kind of environmentally friendly foam instrument pad with support construction
CN210461532U (en) * 2019-09-20 2020-05-05 天津市致广微科技发展有限公司 Efficient environment-friendly instrument foam pad
CN211732212U (en) * 2019-12-12 2020-10-23 杭州真树园林设计工程有限公司 Freight container for commodity circulation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207697682U (en) * 2017-12-26 2018-08-07 安徽省龙佳交通设备有限公司 A kind of lorry rear-end device using foamed aluminium
CN209433881U (en) * 2019-03-29 2019-09-24 天津市致广微科技发展有限公司 A kind of environmentally friendly foam instrument pad with support construction
CN210461532U (en) * 2019-09-20 2020-05-05 天津市致广微科技发展有限公司 Efficient environment-friendly instrument foam pad
CN211732212U (en) * 2019-12-12 2020-10-23 杭州真树园林设计工程有限公司 Freight container for commodity circulation

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Application publication date: 20210406